我正在一个方法中创建一个内部类。之后我访问了一些语句,如
public class Test extends MainScreen
{
HorizontalFieldManager hfm;
Bitmap bitmap[] = new Bitmap[100];
BitmapField[] bitmapField = new BitmapField[100];
int countBitmap = 0;
Test()
{
VerticalFieldManager vfm_Main = new VerticalFieldManager();
hfm = new HorizontalFieldManager(HorizontalFieldManager.USE_ALL_WIDTH);
vfm_Main.add(hfm);
add(vfm_Main);
}
void drawBitmap()
{
bitmap[countBitmap] = new Bitmap(100, 100);
bitmapField[countBitmap] = new BitmapField(bitmap[countBitmap]){
public void paint(Graphics g)
{
................
................
g.drawLine(x1,y1,x2,y2);
}
}
synchronized(UiApplication.getEventLock())
{
for(int i = 0 ; i < bitmapField.length; i++)
{
if(bitmapField[i] != null)
{
bitmapField[i].setBitmap(bitmap[i]);
}
}
hfm.add(bitmapField[countBitmap]);
countBitmap++;
但问题是在创建位图&amp;在创建bitmapField之前,控制转到
synchronized(UiApplication.getEventLock()){hfm.add(bitmapField[countBitmap]); }
因此,在创建bitmapField之前,它会将其添加到hfm。
中所以输出就像“每次在hfm中添加一个新的BitmapField(通过替换前一个意味着在同一位置)”。但我希望BitmapFields在hfm中彼此相邻。
怎么做?
为什么控件在新的bitmapField()内部类之前首先进入hfm.add()的任何解决方案?
答案 0 :(得分:1)
首先,关于代码的一些建议:
如果你想在BitmapField中使用一些自定义构造函数或新字段,最好创建一个新类作为BitmapField的扩展
class TestScr extends MainScreen {
HorizontalFieldManager hfm;
Bitmap bitmap[] = new Bitmap[100];
BitmapField[] bitmapField = new BitmapField[100];
TestScr() {
hfm = new HorizontalFieldManager();
add(hfm);
drawBitmap();
}
void drawBitmap() {
for (int i = 0; i < 5; i++) {
bitmap[i] = new Bitmap(50, 50);
Graphics graphics = new Graphics(bitmap[i]);
graphics.setColor(Color.RED);
String number = Integer.toString(i);
Font font = graphics.getFont().derive(Font.BOLD, 40, Ui.UNITS_px);
graphics.setFont(font);
int textWidth = graphics.getFont().getAdvance(number);
int textHeight = graphics.getFont().getHeight();
int x = (bitmap[i].getWidth() - textWidth) / 2;
int y = (bitmap[i].getHeight() - textHeight) / 2;
graphics.drawText(number, x, y);
bitmapField[i] = new BitmapField(bitmap[i]) {
public void paint(Graphics g) {
super.paint(g);
int width = getWidth() - 1;
int height = getHeight() - 1;
g.setColor(Color.GREEN);
g.drawLine(0, 0, width, 0);
g.drawLine(width, 0, width, height);
g.drawLine(width, height, 0, height);
g.drawLine(0, height, 0, 0);
}
};
hfm.add(bitmapField[i]);
}
}
}